▎ 摘　　要

NOVELTY - Preparing graphene/modified bentonite composite material comprises: (i) ball-milling natural graphite powder with tannic acid to obtain graphene; (ii) ball-milling bentonite with tannic acid to obtain modified bentonite; and (iii) ball-milling obtained graphene aqueous solution and modified bentonite aqueous solution, centrifuging, washing, filtering, and freeze-drying. USE - The method is useful for preparing graphene/modified bentonite composite material, which is useful for adsorbing organic dye methylene blue (claimed). ADVANTAGE - The method utilizes tannic acid to improve graphite peeling degree to obtain thinner graphene sheet layer, and improve hydrophilicity of bentonite. The composite material: is green and environment-friendly; and has good adsorption effect, good biocompatibility.